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Zero-shot learning is a learning regime that recognizes unseen classes by generalizing the visual-semantic relationship learned from the seen classes. To obtain an effective ZSL model, one may resort to curating training samples from…

Computer Vision and Pattern Recognition · Computer Science 2022-09-07 Zhi Chen , Yadan Luo , Sen Wang , Jingjing Li , Zi Huang

Generalized zero-shot learning (GZSL) aims to recognize both seen and unseen classes by transferring knowledge from semantic descriptions to visual representations. Recent generative methods formulate GZSL as a missing data problem, which…

Computer Vision and Pattern Recognition · Computer Science 2020-09-02 Yu-Chao Gu , Le Zhang , Yun Liu , Shao-Ping Lu , Ming-Ming Cheng

Generalized zero shot learning (GZSL) is defined by a training process containing a set of visual samples from seen classes and a set of semantic samples from seen and unseen classes, while the testing process consists of the classification…

Computer Vision and Pattern Recognition · Computer Science 2019-02-07 Rafael Felix , Michele Sasdelli , Ian Reid , Gustavo Carneiro

Learning to classify unseen class samples at test time is popularly referred to as zero-shot learning (ZSL). If test samples can be from training (seen) as well as unseen classes, it is a more challenging problem due to the existence of…

Machine Learning · Statistics 2019-09-11 Vinay Kumar Verma , Dhanajit Brahma , Piyush Rai

Out-of-distribution (OOD) detection is critical to ensuring the reliability and safety of machine learning systems. For instance, in autonomous driving, we would like the driving system to issue an alert and hand over the control to humans…

Computer Vision and Pattern Recognition · Computer Science 2024-01-24 Jingkang Yang , Kaiyang Zhou , Yixuan Li , Ziwei Liu

Current approaches in Generalized Zero-Shot Learning (GZSL) are built upon base models which consider only a single class attribute vector representation over the entire image. This is an oversimplification of the process of novel category…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Joshua Feinglass , Jayaraman J. Thiagarajan , Rushil Anirudh , T. S. Jayram , Yezhou Yang

Generalized Zero-Shot Learning (GZSL) is the task of leveraging semantic information (e.g., attributes) to recognize the seen and unseen samples, where unseen classes are not observable during training. It is natural to derive generative…

Computer Vision and Pattern Recognition · Computer Science 2021-07-08 Zhi Chen , Yadan Luo , Sen Wang , Ruihong Qiu , Jingjing Li , Zi Huang

Generalized zero-shot learning (GZSL) is a technique to train a deep learning model to identify unseen classes using the attribute. In this paper, we put forth a new GZSL technique that improves the GZSL classification performance greatly.…

Computer Vision and Pattern Recognition · Computer Science 2021-12-30 Junhan Kim , Kyuhong Shim , Byonghyo Shim

Detecting out-of-distribution (OOD) inputs is a principal task for ensuring the safety of deploying deep-neural-network classifiers in open-set scenarios. OOD samples can be drawn from arbitrary distributions and exhibit deviations from…

Computer Vision and Pattern Recognition · Computer Science 2024-09-11 Choubo Ding , Guansong Pang

It is a recognized fact that the classification accuracy of unseen classes in the setting of Generalized Zero-Shot Learning (GZSL) is much lower than that of traditional Zero-Shot Leaning (ZSL). One of the reasons is that an instance is…

Computer Vision and Pattern Recognition · Computer Science 2020-06-12 Xinpeng Li

We propose an optimal transport (OT) framework for generalized zero-shot learning (GZSL), seeking to distinguish samples for both seen and unseen classes, with the assist of auxiliary attributes. The discrepancy between features and…

Machine Learning · Computer Science 2020-12-29 Wenlin Wang , Hongteng Xu , Guoyin Wang , Wenqi Wang , Lawrence Carin

Generalized Zero-shot Learning (GZSL) has yielded remarkable performance by designing a series of unbiased visual-semantics mappings, wherein, the precision relies heavily on the completeness of extracted visual features from both seen and…

Computer Vision and Pattern Recognition · Computer Science 2023-12-05 Zhijie Rao , Jingcai Guo , Xiaocheng Lu , Qihua Zhou , Jie Zhang , Kang Wei , Chenxin Li , Song Guo

We focus on the challenge of out-of-distribution (OOD) detection in deep learning models, a crucial aspect in ensuring reliability. Despite considerable effort, the problem remains significantly challenging in deep learning models due to…

Computer Vision and Pattern Recognition · Computer Science 2023-05-30 Yunhao Ge , Jie Ren , Jiaping Zhao , Kaifeng Chen , Andrew Gallagher , Laurent Itti , Balaji Lakshminarayanan

Out-of-distribution (OOD) object detection is an important yet underexplored task. A reliable object detector should be able to handle OOD objects by localizing and correctly classifying them as OOD. However, a critical issue arises when…

Computer Vision and Pattern Recognition · Computer Science 2026-03-18 Sadia Ilyas , Annika Mütze , Klaus Friedrichs , Thomas Kurbiel , Matthias Rottmann

Generalized zero-shot learning(GZSL) aims to classify samples from seen and unseen labels, assuming unseen labels are not accessible during training. Recent advancements in GZSL have been expedited by incorporating…

Computer Vision and Pattern Recognition · Computer Science 2023-09-15 Riti Paul , Sahil Vora , Baoxin Li

Out-of-distribution (OOD) detection has emerged as a popular technique to enhance the reliability of machine learning models by identifying unexpected inputs from unknown classes. Recent progress in pre-trained vision-language models (VLMs)…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Yuanwei Hu , Bo Peng , Yadan Luo , Zhen Fang , Ling Chen , Jie Lu

Multi-label zero-shot learning strives to classify images into multiple unseen categories for which no data is available during training. The test samples can additionally contain seen categories in the generalized variant. Existing…

Computer Vision and Pattern Recognition · Computer Science 2023-08-01 Akshita Gupta , Sanath Narayan , Salman Khan , Fahad Shahbaz Khan , Ling Shao , Joost van de Weijer

In this paper, we address the problem of class-generalizable anomaly detection, where the objective is to develop a unified model by focusing our learning on the available normal data and a small amount of anomaly data in order to detect…

Machine Learning · Computer Science 2026-01-28 Padmaksha Roy , Lamine Mili , Almuatazbellah Boker

In an out-of-distribution (OOD) detection problem, samples of known classes(also called in-distribution classes) are used to train a special classifier. In testing, the classifier can (1) classify the test samples of known classes to their…

Computer Vision and Pattern Recognition · Computer Science 2023-02-06 Sepideh Esmaeilpour , Bing Liu , Eric Robertson , Lei Shu

Few-shot Out-of-Distribution (OOD) detection has emerged as a critical research direction in machine learning for practical deployment. Most existing Few-shot OOD detection methods suffer from insufficient generalization capability for the…

Computer Vision and Pattern Recognition · Computer Science 2025-08-11 Pinxuan Li , Bing Cao , Changqing Zhang , Qinghua Hu